There are several possible reasons for stomach pain after eating: first, consider whether there is a certain relationship with the food consumed, such as over-eating raw and cold and spicy stimulating food, it is possible to have stomach pain and discomfort, these are normal physiological phenomena. Secondly, a history of alcohol consumption or taking painkillers and other medication can also cause stomach pain and discomfort. Thirdly, organic lesions, such as gastritis, gastric ulcer, gastric cancer, etc., can cause stomach pain and discomfort, and it is advisable to improve the barium meal fluoroscopy and gastroscopy and other related examinations to identify the cause and carry out the corresponding symptomatic treatment. Fourth, special circumstances should also be considered, such as after overeating, it is necessary to consider the possibility of acute pancreatitis, it is advisable to improve the blood amylase series, as well as abdominal ultrasound and abdominal CT and other related examinations. Fifth, the early symptoms of acute appendicitis, can also appear stomach pain and discomfort, followed by metastatic right lower abdominal pain, it is recommended to improve the blood routine and appendix ultrasound examination.